How to whitelist just some attributes with HTMLpurifier? I want HTMLpurifier to delete all the other, not allowed attributes.
HTML.AllowedAttributes. Note that when using HTML.AllowedAttributes, you need to also be using HTML.AllowedElements. And you'll probably need to add more as you go along. Like AllowedFrameTargets for target="", AllowedRel, AllowedRev, EnableAttrID, ... Not much choice but testing thoroughly.